001 /* ========================================================================
002 * JCommon : a free general purpose class library for the Java(tm) platform
003 * ========================================================================
004 *
005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006 *
007 * Project Info: http://www.jfree.org/jcommon/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022 * USA.
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * --------------------
028 * URLClassFactory.java
029 * --------------------
030 * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
031 *
032 * Original Author: Thomas Morgner;
033 * Contributor(s): David Gilbert (for Object Refinery Limited);
034 *
035 * $Id: URLObjectDescription.java,v 1.3 2005/11/14 11:04:43 mungady Exp $
036 *
037 * Changes (from 19-Feb-2003)
038 * -------------------------
039 * 19-Feb-2003 : Added standard header and Javadocs (DG);
040 * 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon
041 *
042 */
043
044 package org.jfree.xml.factory.objects;
045
046 import java.net.URL;
047
048 import org.jfree.io.IOUtils;
049 import org.jfree.util.Log;
050 import org.jfree.xml.Parser;
051
052 /**
053 * An object-description for a <code>URL</code> object.
054 *
055 * @author Thomas Morgner
056 */
057 public class URLObjectDescription extends AbstractObjectDescription {
058
059 /**
060 * Creates a new object description.
061 */
062 public URLObjectDescription() {
063 super(URL.class);
064 setParameterDefinition("value", String.class);
065 }
066
067 /**
068 * Creates an object based on this description.
069 *
070 * @return The object.
071 */
072 public Object createObject() {
073 final String o = (String) getParameter("value");
074 final String baseURL = getConfig().getConfigProperty(Parser.CONTENTBASE_KEY);
075 try {
076 try {
077 final URL bURL = new URL(baseURL);
078 return new URL(bURL, o);
079 }
080 catch (Exception e) {
081 Log.warn("BaseURL is invalid: ", e);
082 }
083 return new URL(o);
084 }
085 catch (Exception e) {
086 return null;
087 }
088 }
089
090 /**
091 * Sets the parameters of this description object to match the supplied object.
092 *
093 * @param o the object (should be an instance of <code>URL</code>).
094 *
095 * @throws ObjectFactoryException if the object is not an instance of <code>URL</code>.
096 */
097 public void setParameterFromObject(final Object o) throws ObjectFactoryException {
098 if (!(o instanceof URL)) {
099 throw new ObjectFactoryException("Is no instance of java.net.URL");
100 }
101
102 final URL comp = (URL) o;
103 final String baseURL = getConfig().getConfigProperty(Parser.CONTENTBASE_KEY);
104 try {
105 final URL bURL = new URL(baseURL);
106 setParameter("value", IOUtils.getInstance().createRelativeURL(comp, bURL));
107 }
108 catch (Exception e) {
109 Log.warn("BaseURL is invalid: ", e);
110 }
111 setParameter("value", comp.toExternalForm());
112 }
113
114 }